[239 U.S. 441, 443]
Mr. Fred Farrar, Attorney General of Colorado, and Messrs. Norton Montgomery, James A. Marsh, and George Q. Richmond for defendants in error.

Mr. Justice Holmes delivered the opinion of the court:

This is a suit to enjoin the State Board of Equalization and the Colorado Tax Commission from putting in force and the defendant Pitcher, as assessor of Denver, from obeying, an order of the boards, increasing the valuation of all taxable property in Denver 40 per cent. The order
[239 U.S. 441, 444]
was sustained and the suit directed to be dismissed by the supreme court of the state. 56 Colo. 512, 138 Pac. 1010. See 56 Colo. 343, 138 Pac. 509. The plaintiff is the owner of real estate in Denver, and brings the case here on the ground that it was given no opportunity to be heard, and that therefore its property will be taken without due process of law, contrary to the 14th Amendment of the Constitution of the United States. That is the only question with which we have to deal. There are suggestions on the one side that the construction of the state Constitution and laws was an unwarranted surprise, and on the other, that the decision might have been placed, although it was not, on the ground that there was an adequate remedy at law. With these suggestions we have nothing to do. They are matters purely of state law. The answer to the former needs no amplification; that to the latter is that the allowance of equitable relief is a question of state policy, and that as the supreme court of the state treated the merits as legitimately before it, we are not to speculate whether it might or might not have thrown out the suit upon the preliminary ground.

For the purposes of decision we assume that the constitutional question is presented in the baldest way,-that neither the plaintiff nor the assessor of Denver, who presents a brief on the plaintiff's side, nor any representative of the city and county, was given an opportunity to be heard, other than such as they may have had by reason of the fact that the time of meeting of the boards is fixed by law. On this assumption it is obvious that injustice may be suffered if some property in the county already has been valued at its full worth. But if certain property has been valued at a rate different from that generally prevailing in the county, the owner has had his opportunity to protest and appeal as usual in our system of taxation (Hagar v. Reclamation Dist.
111
U.S. 701, 709
, 710 S., 28 L. ed. 569, 572, 573, 4 Sup. Ct. Rep. 663), so that it must be assumed that the property
[239 U.S. 441, 445]
owners in the county all stand alike. The question, then, is whether all individuals have a constitutional right to be heard before a matter can be decided in which all are equally concerned,-here, for instance, before a superior board decides that the local taxing officers have adopted a system of undervaluation throughout a county, as notoriously often has been the case. The answer of this court in the State R. Tax Cases,
92 U.S. 575
, 23 L. ed. 663, at least, as to any further notice, was that it was hard to believe that the proposition was seroulsy made.

Where a rule of conduct applies to more than a few people, it is impracticable that everyone should have a direct voice in its adoption. The Constitution does not require all public acts to be done in town meeting or an assembly of the whole. General statutes within the state power are passed that affect the person or property of individuals, sometimes to the point of ruin, without giving them a chance to be heard. Their rights are protected in the only way that they can be in a complex society, by their power, immediate or remote, over those who make the rule. If the result in this case had been reached, as it might have been by the state's doubling the rate of taxation, no one would suggest that the 14th Amendment was violated unless every person affected had been allowed an opportunity to raise his voice against it before the body intrusted by the state Constitution with the power. In considering this case in this court we must assume that the proper state machinery has been used, and the question is whether, if the state Constitution had declared that Denver had been undervalued as compared with the rest of the state, and had decreed that for the current year the valuation should be 40 per cent higher, the objection now urged could prevail. It appears to us that to put the question is to answer it. There must be a limit to individual argument in such matters if government is to go on. In Londoner v. Denver,
210 U.S. 373
,
[239 U.S. 441, 446]
385, 52 L. ed. 1103, 1112, 28 Sup. Ct. Rep. 708, a local board had to determine 'whether, in what amount, and upon whom' a tax for paving a street should be levied for special benefits. A relatively small number of persons was concerned, who were exceptionally affected, in each case upon individual grounds, and it was held that they had a right to a hearing. But that decision is far from reaching a general determination dealing only with the principle upon which all the assessments in a county had been laid.